136430421 has 8 divisors (see below), whose sum is σ = 181984320. Its totient is φ = 90915072.

The previous prime is 136430407. The next prime is 136430429. The reversal of 136430421 is 124034631.

136430421 is a nontrivial binomial coefficient, being equal to C(16519, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136430421 - 2⁷ = 136430293 is a prime.

It is a super-2 number, since 2×136430421² = 37226519548474482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136430391 and 136430400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136430429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 16518.

It is an arithmetic number, because the mean of its divisors is an integer number (22748040).

Almost surely, 2^136430421 is an apocalyptic number.

136430421 is the 16518-th triangular number.

It is an amenable number.

136430421 is a deficient number, since it is larger than the sum of its proper divisors (45553899).

136430421 is a wasteful number, since it uses less digits than its factorization.

136430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19275.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 136430421 is about 11680.3433596791. The cubic root of 136430421 is about 514.7982632736.

The spelling of 136430421 in words is "one hundred thirty-six million, four hundred thirty thousand, four hundred twenty-one".